Blower



Jan. 20, 1948. I B. J. PAULSON 2,434,745

BLOWER Filed May 8, 1945 2 Sheets-Sheet 1 INVENTOR.

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B. J PAULSON BLOWER Filed May 8, 1945 2 Sheets-Sheet 2 INVENTOR.flf/mlwa 1 24 60M ATTORNEY.

Patented Jan. 20, 1948 UNITED STATES PATENT OFFICE BLOWER Bernard J.Paulson, Waukesha, Wis.

Application May 8, 1945,, Serial No. 592,680

8 Claims. 1

My invention relates to blowers and more particularly to a type ofblower that may be used for conveying air, vapor, liquids or the like.

The object of my invention is to provide a revolving blower bladeconsisting of a hollow shell provided with ports in the form ofoutwardly extending louvers embossed on its circumferential peripheralsurface, which blade, when revolved, produces a radially controlled andaccelerated stream of air, centralized at a definite point, caused bythe variation in the velocity of the air entering at the various portsdue to the shape of the blower blade, the louvers on the peripheralsurface providing a continuous, centripetal deflection of air andproducing a high volumetric internalcurrent within the shell.

An object of my invention is to provide greatly increased volumetricefiiciency, as compared with blowers of more conventional design, bycombining length with diameter, thus securing an all directional intakeof air and securing a greater range of volumetric flexibility andcontrol.

A'stil'l further object of my invention is to providea device of thecharacter described that is equipped with a centrally disposed propellerfan, employed to circulate and exhaust the air taken into the enclosureby means of the louvers embossed on the outer periphery of the revolvingcone.

Another object of my invention is to provide means on the open end ofthe conical structure,

in the form-of propeller fans rotating at a speed greater than the cone,for impelling additional air to mixwith the centripetally induced flowof air in the case of the convex cone structure, or expelling the flowof air centripetally induced into a concave core structure by thelouvers on the outer periphery of the revolving cone.

The device, as illustrated, described and claimed, will produce asupercharging efiect causing a dense cushion of air of high velocity,due to the shape of the blower blade and the position or the outwardlyextending louvers disposed on the circumferential periphery of theblade, thereby affecting a high propulsion and volumetric efficiency.The device may be employed as a blower, a mixer, or a homogenizingmachine depending on the type of element being employed, whether it beair, vapor or liquid.

Other and further objects of my invention will become more apparent asthe description proceeds whentaken in conjunctionwith the drawing,inwhich,

Figure I is a fragmentary, cross sectional View of a convex type ofblower blade and its mountings,-showing the plurality of louversprojecting outward from its peripheral surface.

Figure 2 is a fragmentary, perspective view of a port or louver showingits construction with a semi-circular cuttingedge at its open end.

Figure 3 isasimil'ar view as shown in Figure 2, but showing the louversof an elongated construction.

'Figure'4 is a fragmentary cross sectional-view of a convex type ofblower blade and its mounting, similar to that shown'in Figure I, butprovided with a, centrally disposed exhaust fan in the form of apropeller, and a pair of propeller fans, one on each end of the devicefor impelling a flow of air to mix with the air induced by the louversprojecting outward from its peripheral surface.

Similar characters of reference indicate corresponding parts throughoutthe several views and referring now to the same, the characters [0 and[0, in Figure 1, show hollow shells or conical blower blades having aplurality of ports or louvers I I embossed outwardly on their peripheralsurface, These louvers are shown in sta gered relation to one another,and are also shown arranged in a circular path on the periphery of theblades. The contour of the cones l0 and I0 perm-it alignment of thelouvers ina manner whereby the number of louvers [1' near the endportion supporting the cones are less" than the number of louvers nearthe center of the blade assembly. Obviously; in the rotation of thecones the louvers near the ends will scoop less air than the louversnear the center, due to the variation in the speed 'of their travel. Thelouvers at the large circumference travel faster than those near the endwhere the circumference is smaller.

The conical shells l0 and Ill are attached to-a shaft [2 at [3 by meansof collars, andthe shaft [2 is shown supported by bearings 14' which maybe of any conventional design. The shaft l'2 may be rotated by anactuating means, not shown, connected by a belt to a pulley l5 as shown,or in any other convenient manner. The open ends of the cones I0 and I0are shown provided with outwardly extending flanges [6' around theirentire periphery. These flanges l6 engage an annular semi-circular ductencircling the: entire unit and terminating into an outlet tube It.Centrally disposed on the shaft [2 and in direct alignment with the duct[1, in Figure 1, is an annular conical shaped ballle [9' attached to theshaft [2 and'extending outward therefrom. The baffle I9 is employed todeflect the air or the like scooped by thelouvers H and which followsthe path indicatecl bythe arrows into the duct IT from which it isforced outward through the tubular member l8. The air being scooped bythe louvers ll entering the cones is directed toward the center of theblade assembly and builds up a pressure which is deflected by the bafiieI9 into the duct [1.

The shape of the louvers l I may be either semiradial, as shown inFigure 2, or elongated, as shown in Figure 3. In every instance, thecanopy 20 tapers from the opening formed by the cutting edge 2! downwardto a point 22. This canopy may be either straight or angularly disposedin relation to the opening ll formed by the edge 2!.

In Figure 6 is shown a convex type of assembly I louvers are open attheir face and taper toward the surface of said shell.

open and provided with an internal gear 34. The 1.

conical blades [0 and [0' are supported by the shaft l2, by means ofarms 26 attached to the shaft i2 at 2?. Attached to these arms issemiradial baffle 35 rotating with the cones l0 and 10'.

At the ends of the shaft 12 is a spur gear 36 on which is mounted apropeller fan 37. This gear is rotatably mounted on the shaft l2 and notattached thereto. An intermittent auxiliary spur gear 38 is rotatablymounted onto a shaft 39 supported by the bearings M at each end. Thesegears 33 engage the internal gear 34 and the spur gears 36. As theinternal gears 34 are rotated with the cones l6 and H3 supported on theshaft I2, the auxiliary gears 38 will revolve due to their engagementwith the internal gear 34, and will cause the spur gears 36 supportingthe propeller fans 31, to revolve at a higher speed, thus the propellerfans 3'? will be caused to speed up and impel outside air into theenclosure formed by the cones i0 and [8. This air will be deflected bythe baffle 35 in its travel.

In thecenter of the structure is shown a propeller fan 59 mounted to theshaft [2 at 40 and revolving thereunto. The fan 39 has its bladesangularly disposed to scoop the air within the enclosure formed by thecones l0 and I0 outward through the tubular members 41 and 4|.Obviously, as many of these tubes 4! and 41 may be employed as deemednecessary or convenient to convey the air within the enclosure to thevarious points of use.

It is manifest to anyone familiar with the art that the type of blowerarrangement described may be employed to provide pressure as well assuction depending on the shape of the blade, and although I have shown aspecific type of construction to portray the arrangement of the variousparts performing the functions outlined, I fully realize that manychanges may be made in the configuration of the various parts, and Ireserve the right to make such changes as may suggest themselves in theconstruction of the device without departing in any way from the spiritof my invention or the scope of the appendant claims.

Having thus described my invention, what I claim and desire to secure byLetters Patent in the United States is:

1. A blower of the character described comprising a spherical blower fanprovided with outwardly extending louvers embossed on its peripheralsurface, an enclosure provided with openings therein, said enclosuresencircling said fan at its central peripheral surface and adapted toreceive the air scooped by said louvers, and means for revolving saidblower fan within said enclosure.

2. A device of the character described comprising a blowerblade, saidblade consisting of a pair 4. A blower of the character describedcomprising in combination a pair of semi-spherical blower blades, saidblades of hollow construc tion provided with a plurality of outwardlyembossed louvers On their peripheral surface, a shaft disposedlongitudinally through said blades for supporting said blades bearing onthe ends of said shaft for its support, means for causing said shaft tobe rotated, and an enclosure provided with openings and adapted toencircle and receive the open ends of said blower blade.

5. A blower of the character described comprising a spherical blower fanprovided with outwardly extending louvers embossed on its peripheralsurface, an enclosure provided with openings therein, said enclosureencasing said fan at its central portion and adapted to receive the airscooped by said louvers, means for revolving said blower fan within saidenclosure, a

centrifugal discharge fan mounted to said shaft at a central point indirect alignment with the openings within said enclosure.

6. Adevice as described in claim 5, in which the spherical blower fanconsists of two semispherical cones closed at their outer ends andspaced apart on a shaft and having the centrally disposed centrifugaldischarge fan provided with angularly disposed blades to draw the airfrom the opposite sides of said cylindrical blower fan.

7. A blower of the character described comprising in combination, aspherical blower blade, said blade consisting of two sections ofsemi-spherical,

construction spaced apart at their open ends provided with a pluralityof outwardly embossed louvers on its peripheral surface, a shaftdisposed longitudinally through said blower blade sections forsupporting said sections, bearings on the ends of said shaft for itssupport, an enclosure provided with openings and adapted to receive theopen ends of said blower blade, a propeller fan having blades of angularcontour mounted to said shaft at a point in direct alignment with theopenings within said enclosure, said sections of the semi-sphericalblower blade open at their outward ends, internal gears disposed withinsaid openings, spur gears rotatably mounted on said shaft in directalignment with said internal gears, auxiliary gears engaging said spurgears and internal gears, said auxiliary gears rotatably mounted onauxiliary shafts supported by said bearings, propeller fans providedwith a plurality of blades mounted to said spur gears and caused to 5fan for exhausting the air within the cylindrical blower fan through theopenings of said enclosure.

BERNARD J. PAULSON.

REFERENCES CITED The following references are of record in the file ofthis patent:

Number Number France Oct. 21, 1921

